21. Which of the following acts as an intermediary between programs and the computer hardware ?

[A] System Software

[B] Application Software

[C] Web Browsers

[D] CPU

View Answer

ANSWER: Option(A).


MEMORY: No memory available.

22. Who invented computer mouse ?

[A] J . S Kilbi

[B] Fedrico Faggin

[C] Douglas Engelbart

[D] Blaise Pascal

View Answer

ANSWER: Option(C).


MEMORY: No memory available.

23. Which one of the following is largest –

[A] Terrabyte

[B] Yottabyte

[C] Petabyte

[D] Exabyte

View Answer

ANSWER: Option(B).


MEMORY: Terabyte(TB) = 1024 gigabytes, Petabyte(PB) = 1024 terabytes, Exabyte(EB) = 1024 petabytes, Yottabyte(YB) = 1024 zettabytes .

24. A unit in a computer system that carries out arithmetical and logical operations is called ?

[A] CPU

[B] CU

[C] ALU

[D] UPS

View Answer

ANSWER: Option(C).


MEMORY: No memory available.

25. Who invented first commercial ‘CPU’ ?

[A] Herman Holorith

[B] J.P Ekart

[C] Doughlas Engelbart

[D] Federico Faggin

View Answer

ANSWER: Option(D).


MEMORY: No memory available.